Brake-operating mechanism



March '31, 1931. E. G. M DONALD BRAKE OPERATING MECHANISM Filed Oct. 6,1928 INVENTOR. 11W QMS'lPmald I A TTORNEY Patented Mar. 31, 1931 UNITEDSTATES PATENT .orl-" caj,

EUGENE e. MCDONALD, or sour]: BEND, INDIANA, nssrenoa r IBENDIX swam.

m SUTH BEND, NA, A. conrom'rron or" nmmoxs BRAKE-OPERATING MECHANISMApplication flied October 6, 1928. Serial No. 310,858. I I

This invention relates to brakes, and is iling a separately-formedflattened art keyed lustrated as embodied in part of a system-ofoperating mechanism for a set of four-wheel automobile brakes. An.object of the inven- 5 tion is to provide simple means through which ashaft mounted in fixed bearings may have an equalizing action inoperating the brakes or their equivalent. v

In one desirable arrangement, the shaft has 7 .10 a flattened part,preferably keyed thereto,

slidably received in a slot in an intermediate portion of a double leverconnected at its ends to the brakes or the like.

The above and other objects and features of the invention, includingvarious novel and desirable details of construction, willbe apparentfrom the following description of one illustrative embodiment shown inthe accompanying drawing, in which: The figure is a partial perspectiveof the end of the shaft and associated'parts.

In the-drawing, a shaft 10 mounted rotatably in fixed bearings (notshown) has at its ends a flattened part 12, preferably formed separatelyfrom the shaft and sethereto at its-end, a double lever aving betweenits ends a portion'formed with a transverse slotslidably embracing saidflattened part, and force-transmitting tension element .5.

connected'one to each end ofsaid lever and extending in oppositedirections therefrom. In testimony. whereof, I' have hereunto signed myname.

a EUGENE o. McDONALD. [to

cured to rotate therewith by means such as a key 14. The flattened part12 is slidablyreceived in a transverse horizontal slot 16 in anintermediate portion of a vertically-arranged double lever 18 havingconnected at its ends force-transmitting members 20 and 22 extending inopposite directions to the front and rear brakes or their equivalents.

In operation,'rotation' of the brake cross or rock shaft 10 by thedriver operated service pedal serves to transmit the driving torque tothe double lever 18, which torque is equally distributed to theforce-transmitting members 20 and 22 by virtue of the balancing actionof said lever, the same sliding to balance said forces along theflattened part 12 of the rock shaft. v

While one illustrative embodiment has been described .in detail, it isnot my intention to limit the scope of the invention to that particularembodiment, or otherwise than by the terms of the appended claim.

I claim: k An operating device for a system of brakes comprising, incombination, a rockshaft hav-

